Oz, there is a blade, I checked several times to see if the wires were getting any damage. I tried to make sure that the wires were somewhat split so the blade goes between them. Seems to be fine, I can check in a few weeks to verify. But, I don't think there shouldn't be any issue if the wires are solid/snug with no movement then there won't be any chaffing.

You probably answered this somewhere in this thread but I'm too lazy to read all 105 posts! Will the LEDs dim with the dash dimmer switch? Aren they as bright as stock swt illumination such as the heater controls?